# Custom CSS field

Each block has got Custom CSS field on the end. Learn how to use it properly.

<figure><img src="https://1517109349-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAEb2xvTC9MyvJ5piB0eJ%2Fuploads%2FatGkI42vxhpsVzjGeTf0%2Fcustom%20CSS.png?alt=media&#x26;token=a8a20415-8802-4cb3-9631-2ec939b4b642" alt=""><figcaption></figcaption></figure>

<mark style="color:green;">**Do:**</mark>

* add CSS properties like color: #000, text-align: left;&#x20;

<mark style="color:red;">**Do not:**</mark>

* add a classes
* add SCSS variables
* add style=""
* add class =""
* add id =""
* etc.